ADAPTIVE MIMO WITH JOINT SELECTION OF ANTENNA ELEMENTS AND TRANSMISSION CRITERION

THIS INVENTION RELATES TO A METHOD TO DYNAMICALLY ENHANCED THE PERFORMANCE OF DATA TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM AND MORE PARTICULARLY TO THE MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) OF THE COMMUNICATION SYSTEM. THE METHOD PROPOSED BY THE PRESENT INVENTION INCLUDES CREATING FLEXIBLE PARAMETERS TO THE MULTI-ELEMENTS ANTENNA ARRAY AND UTILIZING OF SPACE TIME CODING (STC) AND SPATIAL MULTIPLEXING (SM) IN THE TRANSMISSION CRITERION AT THE BASE STATION (BS) (1). THE FLEXIBLE PARAMETERS ARE THE NUMBERS OF ANTENNA ELEMENTS N AND DISTANCE BETWEEN ELEMENTS D. THESE TRANSMISSION CRITERION AND MULTI-ELEMENTS ANTENNA ARRAY CHANGING ACCORDING TO FEEDBACK FROM THE RELAY STATIONS (RS) (2) AND THE RELAY STATIONS (RS) (2) ARE RECEIVING DATA FROM THE SUBSCRIBER STATIONS (SS) (3). FROM THE FEEDBACK FROM A PARTICULAR RELAY STATION (RS) (2), THE TRANSMISSION CRITERION SHALL DETERMINED EITHER TO USE SPACE TIME CODING (STC) OR SPATIAL MULTIPLEXING (SM) OR BOTH AND N AND D CHANGES ACCORDINGLY TO IMPROVE SIGNAL-TO-NOISE RATIO (SNR), BIT ERROR RATE (BER), DATA RATE, RELIABILITY ETC. MOST ILLUSTRATIVE